Study on the Applicability of Ni-W Coated Tubing in CO2 Injection Well Environments

MA Yingwen, XING Xijin, FENG Huanzhi, YANG Zhile, WANG Zhu

doi:10.16577/j.issn.1001-1560.2024.0202

Materials Protection >

2024 , Vol. 57 >Issue 9: 63 - 70

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0202

Study on the Applicability of Ni-W Coated Tubing in CO₂ Injection Well Environments

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(1.CNOOC Research Institute Co.， Ltd.， Beijing 100028， China；2.Institute for Advanced Materials and Technology， University of Science and Technology Beijing， Beijing 100083， China)

MA Yingwen(1974-)， Master， Professorate Senior Engineer， Research Focus: Research and Management of Offshore Drilling and Completion， E-mail:mayw＠cnooc.com.cn

Received date: 2024-01-03

Revised date: 2024-03-14

Accepted date: 2024-03-16

Online published: 2024-11-14

Supported by

Comprehensive Scientific Research Projects of China National Offshore Oil Corporation， “Research on the Evolution of High-Temperature Dynamic Corrosion Environment and Cost-Effective Oil Casing and Tubing Anti-Corrosion Technology”(KJZH-2024-2301)

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Abstract

For studying the applicability of Ni-W coating in CO2 injection wells， the corrosion behaviors of Ni-W coatings were studied by high temperature and high - pressure corrosion simulation experiments combined with scanning electron microscope (SEM)， laser confocal microscope and X-ray diffractometer (XRD).Results showed that the Ni-W coating had certain uniform corrosion resistance under the condition of supercritical CO2 containing impurities injection condition， but there was localized corrosion risk.In the case of CO2 injection well with formation water reflux， a small amount of H2S would induce severe corrosion failure of Ni-W coatings， resulting in cracking and local damage of the coating.In the case of high oxygenated CO2 injection well with formation water reflux， micro-cracks would be formed in Ni-W coatings，and corrosion products would be generated at the inner and outer coating interfaces.

Key words： CCUS; Ni-W coating; super critical CO₂; corrosion; H₂S; O₂ content

Cite this article

MA Yingwen, XING Xijin, FENG Huanzhi, YANG Zhile, WANG Zhu . Study on the Applicability of Ni-W Coated Tubing in CO₂ Injection Well Environments[J]. Materials Protection, 2024 , 57(9) : 63 -70 . DOI: 10.16577/j.issn.1001-1560.2024.0202

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